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Panasonic NN-9509 Service Manual page 20

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COMPONENT TEST PROCEDURE
CAUTION
1. High voltage is present at the high voltage terminal
of the high voltage transformer during any cook
cycle.
~
:
2. It is neither
Necessary
nor advisable to attempt
measurement of the high voltage.
3, Before touching any oven components, or wiring,
always unplug the oven from its power source and
discharge the high voltage capacitor.
FILAMENT
WINDING
"TERMINALS
SECONDARY
WINDING
TERMINALS
em
PRIMARY
WINDING
TERMINALS
Se
a
4. Primary Latch Switch, Secondary (Secondary Latch
Switch and Power relay B) Interlocks.
[Boor
Opened [Boor Giosed |
2. Short Switch & Monitor Circuit
(B) For CPH/CQH
only
make short circuit across the lead wires connected to power relay B
(RY2) with temporary jumper wire for testing.
MAGNETRON
_ FILAMENT
Mechanical Models
Some Ohm
0Q
See Note
(A) Remove
connections
from the transformer terminals
and check
COOLING
continuity.
4. High voltage capacitor
5. Magnetron
Continuity checks can only indicate an open filament or a shorted
magnetron. To diagnose for an.open filament or shorted magnetron.
(A) Isolate magnetron from the circuit by disconnecting the leads.

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Nn-9809Nn-9859